Simulation Analysis on the Mud Film Stability for Urban Slurry Shield Tunnel
Objective As the sand layer located at the launching end of the slurry shield section is connected with seawater during the tunnel construction of Xiamen Metro Line 3, accidents like water and mud gushing, ground collapse may occur when the shield starts. Therefore, it is necessary to study the mud...
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| Format: | Article |
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Urban Mass Transit Magazine Press
2024-10-01
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| Series: | Chengshi guidao jiaotong yanjiu |
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| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2024.10.006.html |
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| author | ZHOU Yu ZHANG Zhimin XIONG Hao CHEN Fan HAN Kaihang HUANG Mingfeng |
| author_facet | ZHOU Yu ZHANG Zhimin XIONG Hao CHEN Fan HAN Kaihang HUANG Mingfeng |
| author_sort | ZHOU Yu |
| collection | DOAJ |
| description | Objective As the sand layer located at the launching end of the slurry shield section is connected with seawater during the tunnel construction of Xiamen Metro Line 3, accidents like water and mud gushing, ground collapse may occur when the shield starts. Therefore, it is necessary to study the mud film stability of urban slurry shield tunnel to ensure the construction safety. Method A numerical model is developed to simulate the mud film formation and infiltration process under different permeability conditions by using the DEM-CFD (Discrete Element Method-Computational Fluid Dynamics) coupling method. The impermeability stability of the mud film is evaluated by analyzing the spatial distribution of slurry particles, the mud film hydraulic pressure changes, and the force chain network. Result & Conclusion The increase in sand particle size and slurry cohesion inhibits and enhances mud film formation, its long-term impermeability and mechanical stability under dynamic hydraulic loads respectively. The increase in cohesion enhances both the mud film forming density and the impermeability stability. However, the enhancement of impermeability stability is limited for the mud film on smaller grain size stratum. In sandy stratum with large pores and low cohesion, the mud film is prone to collapse, but increasing the cohesive force can effectively enhance its stability. Therefore, by selecting the appropriate particle size ratio and slurry cohesion, mud film impermeability stability can be improved to meet the engineering requirements. |
| format | Article |
| id | doaj-art-112e9ca65347456b8a7b1fab604d080c |
| institution | OA Journals |
| issn | 1007-869X |
| language | zho |
| publishDate | 2024-10-01 |
| publisher | Urban Mass Transit Magazine Press |
| record_format | Article |
| series | Chengshi guidao jiaotong yanjiu |
| spelling | doaj-art-112e9ca65347456b8a7b1fab604d080c2025-08-20T02:17:00ZzhoUrban Mass Transit Magazine PressChengshi guidao jiaotong yanjiu1007-869X2024-10-012710394410.16037/j.1007-869x.2024.10.006Simulation Analysis on the Mud Film Stability for Urban Slurry Shield TunnelZHOU Yu0ZHANG Zhimin1XIONG Hao2CHEN Fan3HAN Kaihang4HUANG Mingfeng5Xiamen Metro Construction Co., Ltd., 361010, Xiamen, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, 518060, Shenzhen, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, 518060, Shenzhen, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, 518060, Shenzhen, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, 518060, Shenzhen, ChinaChina First Highway Engineering Xiamen Engineering Co., Ltd., 361021, Xiamen, ChinaObjective As the sand layer located at the launching end of the slurry shield section is connected with seawater during the tunnel construction of Xiamen Metro Line 3, accidents like water and mud gushing, ground collapse may occur when the shield starts. Therefore, it is necessary to study the mud film stability of urban slurry shield tunnel to ensure the construction safety. Method A numerical model is developed to simulate the mud film formation and infiltration process under different permeability conditions by using the DEM-CFD (Discrete Element Method-Computational Fluid Dynamics) coupling method. The impermeability stability of the mud film is evaluated by analyzing the spatial distribution of slurry particles, the mud film hydraulic pressure changes, and the force chain network. Result & Conclusion The increase in sand particle size and slurry cohesion inhibits and enhances mud film formation, its long-term impermeability and mechanical stability under dynamic hydraulic loads respectively. The increase in cohesion enhances both the mud film forming density and the impermeability stability. However, the enhancement of impermeability stability is limited for the mud film on smaller grain size stratum. In sandy stratum with large pores and low cohesion, the mud film is prone to collapse, but increasing the cohesive force can effectively enhance its stability. Therefore, by selecting the appropriate particle size ratio and slurry cohesion, mud film impermeability stability can be improved to meet the engineering requirements.https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2024.10.006.htmlsubway constructionslurry shield tunnelmud film stabilitynumerical simulation |
| spellingShingle | ZHOU Yu ZHANG Zhimin XIONG Hao CHEN Fan HAN Kaihang HUANG Mingfeng Simulation Analysis on the Mud Film Stability for Urban Slurry Shield Tunnel Chengshi guidao jiaotong yanjiu subway construction slurry shield tunnel mud film stability numerical simulation |
| title | Simulation Analysis on the Mud Film Stability for Urban Slurry Shield Tunnel |
| title_full | Simulation Analysis on the Mud Film Stability for Urban Slurry Shield Tunnel |
| title_fullStr | Simulation Analysis on the Mud Film Stability for Urban Slurry Shield Tunnel |
| title_full_unstemmed | Simulation Analysis on the Mud Film Stability for Urban Slurry Shield Tunnel |
| title_short | Simulation Analysis on the Mud Film Stability for Urban Slurry Shield Tunnel |
| title_sort | simulation analysis on the mud film stability for urban slurry shield tunnel |
| topic | subway construction slurry shield tunnel mud film stability numerical simulation |
| url | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2024.10.006.html |
| work_keys_str_mv | AT zhouyu simulationanalysisonthemudfilmstabilityforurbanslurryshieldtunnel AT zhangzhimin simulationanalysisonthemudfilmstabilityforurbanslurryshieldtunnel AT xionghao simulationanalysisonthemudfilmstabilityforurbanslurryshieldtunnel AT chenfan simulationanalysisonthemudfilmstabilityforurbanslurryshieldtunnel AT hankaihang simulationanalysisonthemudfilmstabilityforurbanslurryshieldtunnel AT huangmingfeng simulationanalysisonthemudfilmstabilityforurbanslurryshieldtunnel |